Leighton,

You can't compare objects using = in VFP 5.0a. This capability is available in VFP 6.0. If you know the listboxes will have different names (they have to if they're on the same form, of course), you could use IF THIS.Name=oSource.Name

>VFP 5.0a
>I created two listboxes on a form with drag & drop capabilities.
>
>If the user drags an item from one listbox, but drops it back in the same listbox they dragged it from, I don't want anything to happen.
>
>In the following code, I am trying to say, "If the oSource object is the same object we are dropping on, do nothing."
>
>Can't objects be compared with the = sign?
>
>In the DragDrop event of each listbox I have the code:
>------------------------------------------------------
>LPARAMETERS oSource, nXCoord, nYCoord
>
>if oSource != this
> oSource.dblclick()
>endif